b . johnson freeway ( interstate 63 ##5 ) and the central expressway ( us 75 ) , and is the first five @ - @ level stack interchange to be built in the city . it replaces the anti ##qua ##ted three @ - @ level , modified clover ##leaf interchange built in the 1960s that caused a severe bottle ##neck by narrowing us 75 down to two lanes at the junction of the two highways . the loop ##ed ramps of the clover ##leaf forced motor ##ists to slow down drastically , backing up traffic . left @ - @ hand exits contributed to the congestion . further , its two front ##age roads were not directly connected to each other , making local access difficult
b. johnson freeway ( interstate 635 ) and the central expressway ( us 75 ), and is the first five @ - @ level stack interchange to be built in the city. it replaces the antiquated three @ - @ level, modified cloverleaf interchange built in the 1960s that caused a severe bottleneck by narrowing us 75 down to two lanes at the junction of the two highways. the looped ramps of the cloverleaf forced motorists to slow down drastically, backing up traffic. left @ - @ hand exits contributed to the congestion. further, its two frontage roads were not directly connected to each other, making local access difficult